TY - JOUR AU - Leopardi, Holly AU - Davila-Rodriguez, Josue AU - Quinlan, Franklyn AU - Olson, Judith AU - Diddams, Scott AU - Fortier, Tara C2 - Optica DA - 2017-08-01 LA - en PB - Optica PY - 2017 TI - Single-branch Er:fiber frequency comb for precision optical metrology with 10-18 fractional instability ER -